The family of a man struck and killed by a subway train last year has sued the NYC Transit for failing to protect him.

At first, cops didn’t know if the victim, Luis Enrique Soriano, 66, a baggage handler for Delta Air Lines at LaGuardia Airport, had fallen, fainted or committed suicide on his way to work at 3:37 a.m. Memorial Day, May 31, when he was stuck by a southbound No. 6 train at the Whitlock Avenue station.